1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
/* Copyright © 2017 Hasan Yavuz Özderya This file is part of serialplot. serialplot is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. serialplot is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with serialplot. If not, see <http://www.gnu.org/licenses/>. */ #ifndef SCALEPICKER_H #define SCALEPICKER_H #include <QObject> #include <QMouseEvent> #include <QPen> #include <QWidget> #include <QList> #include <QMap> #include <qwt_scale_widget.h> #include <qwt_widget_overlay.h> class ScalePicker : public QObject { Q_OBJECT public: ScalePicker(QwtScaleWidget* scaleWidget, QWidget* canvas); virtual bool eventFilter(QObject*, QEvent*); void drawPlotOverlay(QPainter*); // called from ScalePickerOverlay void drawScaleOverlay(QPainter*); // called from ScaleOverlay void setPen(QPen pen); signals: void picked(double firstPos, double lastPos); private: QwtScaleWidget* _scaleWidget; QWidget* _canvas; QwtWidgetOverlay* pickerOverlay; // will be PlotOverlay QwtWidgetOverlay* scaleOverlay; // will be ScaleOverlay QPen _pen; bool pressed; bool started; double firstPos; // converted to plot coordinates double firstPosPx; // pixel coordinates double currentPosPx; // current position in pixel coordinates QList<int> snapPoints; /// used to restore precision of snappoints that is lost due to rounding QMap<int, double> snapPointMap; double position(double) const; // returns the axis mouse position relative to plot coordinates int positionPx(QMouseEvent*); // returns the axis mouse position in pixels double posCanvasPx(double pos) const; // returns the given position in canvas coordinates void drawTriangle(QPainter* painter, int position); QwtText trackerText() const; /// Returns tracker text position QRectF trackerTextRect(QPainter* painter, int posPx, QSizeF textSize) const; /// Returns the text position for tracker text shown during picking QRectF pickTrackerTextRect(QPainter* painter, QRect pickRect, QSizeF textSize) const; private slots: void updateSnapPoints(); }; #endif // SCALEPICKER_H